[flang-commits] [flang] [LLVM][DWARF] Add support for monolithic types in .debug_names (PR #70512)
Jonas Devlieghere via flang-commits
flang-commits at lists.llvm.org
Fri Oct 27 14:50:45 PDT 2023
https://github.com/JDevlieghere updated https://github.com/llvm/llvm-project/pull/70512
>From 1c6a604df93b833c3bb9c7d34f4f27415592dbe5 Mon Sep 17 00:00:00 2001
From: Alexander Yermolovich <ayermolo at meta.com>
Date: Thu, 5 Oct 2023 12:39:02 -0700
Subject: [PATCH] [LLVM][DWARF] Add support for monolithic types in
.debug_names
Enable Type Units with DWARF5 accelerator tables for monolithic DWARF.
Implementation relies on linker to tombstone offset in LocalTU list to -1 when
it deduplciates type units using COMDAT.
---
llvm/include/llvm/CodeGen/AccelTable.h | 64 +++++--
llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp | 173 ++++++++++++------
.../lib/CodeGen/AsmPrinter/DwarfCompileUnit.h | 2 +-
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 37 +++-
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h | 12 +-
llvm/lib/CodeGen/AsmPrinter/DwarfFile.cpp | 4 +
llvm/lib/CodeGen/AsmPrinter/DwarfFile.h | 20 ++
llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp | 6 +
llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h | 15 ++
llvm/lib/DWARFLinker/DWARFStreamer.cpp | 18 +-
.../DWARFLinkerParallel/DWARFEmitterImpl.cpp | 13 +-
.../test/DebugInfo/X86/accel-tables-dwarf5.ll | 1 -
.../test/DebugInfo/X86/debug-names-dwarf64.ll | 8 +-
.../X86/debug-names-types-monolithic.ll | 163 +++++++++++++++++
.../DebugInfo/X86/debug-names-types-split.ll | 57 ++++++
.../ARM/dwarf5-dwarf4-combination-macho.test | 14 +-
16 files changed, 503 insertions(+), 104 deletions(-)
create mode 100644 llvm/test/DebugInfo/X86/debug-names-types-monolithic.ll
create mode 100644 llvm/test/DebugInfo/X86/debug-names-types-split.ll
diff --git a/llvm/include/llvm/CodeGen/AccelTable.h b/llvm/include/llvm/CodeGen/AccelTable.h
index d4e21b2ac8e7ebc..d948b7d82b85979 100644
--- a/llvm/include/llvm/CodeGen/AccelTable.h
+++ b/llvm/include/llvm/CodeGen/AccelTable.h
@@ -16,7 +16,6 @@
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/STLFunctionalExtras.h"
-#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/CodeGen/DIE.h"
@@ -104,10 +103,13 @@
namespace llvm {
class AsmPrinter;
-class DwarfCompileUnit;
+class DwarfUnit;
class DwarfDebug;
+class DwarfTypeUnit;
class MCSymbol;
class raw_ostream;
+struct TypeUnitMetaInfo;
+using TUVectorTy = SmallVector<TypeUnitMetaInfo, 1>;
/// Interface which the different types of accelerator table data have to
/// conform. It serves as a base class for different values of the template
@@ -197,6 +199,9 @@ template <typename DataT> class AccelTable : public AccelTableBase {
template <typename... Types>
void addName(DwarfStringPoolEntryRef Name, Types &&... Args);
+ void clear() { Entries.clear(); }
+ void addEntries(AccelTable<DataT> &Table);
+ const StringEntries getEntries() const { return Entries; }
};
template <typename AccelTableDataT>
@@ -250,11 +255,21 @@ class AppleAccelTableData : public AccelTableData {
/// emitDWARF5AccelTable function.
class DWARF5AccelTableData : public AccelTableData {
public:
+ struct AttributeEncoding {
+ dwarf::Index Index;
+ dwarf::Form Form;
+ };
static uint32_t hash(StringRef Name) { return caseFoldingDjbHash(Name); }
- DWARF5AccelTableData(const DIE &Die, const DwarfCompileUnit &CU);
- DWARF5AccelTableData(uint64_t DieOffset, unsigned DieTag, unsigned CUIndex)
- : OffsetVal(DieOffset), DieTag(DieTag), UnitID(CUIndex) {}
+ DWARF5AccelTableData(const DIE &Die, const DwarfUnit &CU,
+ const bool IsTU = false);
+ DWARF5AccelTableData(const uint64_t DieOffset, const unsigned DieTag,
+ const unsigned Index, const bool IsTU = false)
+ : OffsetVal(DieOffset) {
+ Data.DieTag = DieTag;
+ Data.UnitID = Index;
+ Data.IsTU = IsTU;
+ }
#ifndef NDEBUG
void print(raw_ostream &OS) const override;
@@ -265,18 +280,25 @@ class DWARF5AccelTableData : public AccelTableData {
"Accessing DIE Offset before normalizing.");
return std::get<uint64_t>(OffsetVal);
}
- unsigned getDieTag() const { return DieTag; }
- unsigned getUnitID() const { return UnitID; }
+ unsigned getDieTag() const { return Data.DieTag; }
+ unsigned getUnitID() const { return Data.UnitID; }
+ bool isTU() const { return Data.IsTU; }
void normalizeDIEToOffset() {
assert(std::holds_alternative<const DIE *>(OffsetVal) &&
"Accessing offset after normalizing.");
OffsetVal = std::get<const DIE *>(OffsetVal)->getOffset();
}
+ bool isNormalized() const {
+ return std::holds_alternative<uint64_t>(OffsetVal);
+ }
protected:
std::variant<const DIE *, uint64_t> OffsetVal;
- unsigned DieTag;
- unsigned UnitID;
+ struct MetaData {
+ uint32_t DieTag : 16;
+ uint32_t UnitID : 15;
+ uint32_t IsTU : 1;
+ } Data;
uint64_t order() const override { return getDieOffset(); }
};
@@ -288,7 +310,19 @@ class DWARF5AccelTable : public AccelTable<DWARF5AccelTableData> {
void convertDieToOffset() {
for (auto &Entry : Entries) {
for (AccelTableData *Value : Entry.second.Values) {
- static_cast<DWARF5AccelTableData *>(Value)->normalizeDIEToOffset();
+ DWARF5AccelTableData *Data = static_cast<DWARF5AccelTableData *>(Value);
+ if (!Data->isNormalized())
+ Data->normalizeDIEToOffset();
+ }
+ }
+ }
+
+ void addTypeEntries(DWARF5AccelTable &Table) {
+ for (auto &Entry : Table.getEntries()) {
+ for (AccelTableData *Value : Entry.second.Values) {
+ DWARF5AccelTableData *Data = static_cast<DWARF5AccelTableData *>(Value);
+ addName(Entry.second.Name, Data->getDieOffset(), Data->getDieTag(),
+ Data->getUnitID(), true);
}
}
}
@@ -310,8 +344,10 @@ void emitAppleAccelTable(AsmPrinter *Asm, AccelTable<DataT> &Contents,
void emitDWARF5AccelTable(AsmPrinter *Asm, DWARF5AccelTable &Contents,
const DwarfDebug &DD,
- ArrayRef<std::unique_ptr<DwarfCompileUnit>> CUs);
-
+ ArrayRef<std::unique_ptr<DwarfCompileUnit>> CUs,
+ TUVectorTy TUSymbols);
+using GetIndexForEntryReturnType =
+ std::optional<std::pair<unsigned, DWARF5AccelTableData::AttributeEncoding>>;
/// Emit a DWARFv5 Accelerator Table consisting of entries in the specified
/// AccelTable. The \p CUs contains either symbols keeping offsets to the
/// start of compilation unit, either offsets to the start of compilation
@@ -319,8 +355,8 @@ void emitDWARF5AccelTable(AsmPrinter *Asm, DWARF5AccelTable &Contents,
void emitDWARF5AccelTable(
AsmPrinter *Asm, DWARF5AccelTable &Contents,
ArrayRef<std::variant<MCSymbol *, uint64_t>> CUs,
- llvm::function_ref<unsigned(const DWARF5AccelTableData &)>
- getCUIndexForEntry);
+ llvm::function_ref<GetIndexForEntryReturnType(const DWARF5AccelTableData &)>
+ getIndexForEntry);
/// Accelerator table data implementation for simple Apple accelerator tables
/// with just a DIE reference.
diff --git a/llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp b/llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp
index e393951744117eb..90715a805cc5e41 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp
@@ -12,6 +12,7 @@
#include "llvm/CodeGen/AccelTable.h"
#include "DwarfCompileUnit.h"
+#include "DwarfUnit.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Twine.h"
#include "llvm/BinaryFormat/Dwarf.h"
@@ -199,32 +200,30 @@ class Dwarf5AccelTableWriter : public AccelTableWriter {
uint32_t AugmentationStringSize = sizeof(AugmentationString);
char AugmentationString[8] = {'L', 'L', 'V', 'M', '0', '7', '0', '0'};
- Header(uint32_t CompUnitCount, uint32_t BucketCount, uint32_t NameCount)
- : CompUnitCount(CompUnitCount), BucketCount(BucketCount),
- NameCount(NameCount) {}
+ Header(uint32_t CompUnitCount, uint32_t LocalTypeUnitCount,
+ uint32_t BucketCount, uint32_t NameCount)
+ : CompUnitCount(CompUnitCount), LocalTypeUnitCount(LocalTypeUnitCount),
+ BucketCount(BucketCount), NameCount(NameCount) {}
void emit(Dwarf5AccelTableWriter &Ctx);
};
- struct AttributeEncoding {
- dwarf::Index Index;
- dwarf::Form Form;
- };
Header Header;
- DenseMap<uint32_t, SmallVector<AttributeEncoding, 2>> Abbreviations;
+ DenseMap<uint32_t, SmallVector<DWARF5AccelTableData::AttributeEncoding, 2>>
+ Abbreviations;
ArrayRef<std::variant<MCSymbol *, uint64_t>> CompUnits;
- llvm::function_ref<unsigned(const DataT &)> getCUIndexForEntry;
+ ArrayRef<std::variant<MCSymbol *, uint64_t>> TypeUnits;
+ llvm::function_ref<GetIndexForEntryReturnType(const DataT &)>
+ getIndexForEntry;
MCSymbol *ContributionEnd = nullptr;
MCSymbol *AbbrevStart = Asm->createTempSymbol("names_abbrev_start");
MCSymbol *AbbrevEnd = Asm->createTempSymbol("names_abbrev_end");
MCSymbol *EntryPool = Asm->createTempSymbol("names_entries");
- DenseSet<uint32_t> getUniqueTags() const;
-
- // Right now, we emit uniform attributes for all tags.
- SmallVector<AttributeEncoding, 2> getUniformAttributes() const;
+ void populateAbbrevsMap();
void emitCUList() const;
+ void emitTUList() const;
void emitBuckets() const;
void emitStringOffsets() const;
void emitAbbrevs() const;
@@ -235,7 +234,9 @@ class Dwarf5AccelTableWriter : public AccelTableWriter {
Dwarf5AccelTableWriter(
AsmPrinter *Asm, const AccelTableBase &Contents,
ArrayRef<std::variant<MCSymbol *, uint64_t>> CompUnits,
- llvm::function_ref<unsigned(const DataT &)> GetCUIndexForEntry);
+ ArrayRef<std::variant<MCSymbol *, uint64_t>> TypeUnits,
+ llvm::function_ref<GetIndexForEntryReturnType(const DataT &)>
+ getIndexForEntry);
void emit();
};
@@ -358,8 +359,13 @@ void AppleAccelTableWriter::emit() const {
}
DWARF5AccelTableData::DWARF5AccelTableData(const DIE &Die,
- const DwarfCompileUnit &CU)
- : OffsetVal(&Die), DieTag(Die.getTag()), UnitID(CU.getUniqueID()) {}
+ const DwarfUnit &Unit,
+ const bool IsTU)
+ : OffsetVal(&Die) {
+ Data.DieTag = Die.getTag();
+ Data.UnitID = Unit.getUniqueID();
+ Data.IsTU = IsTU;
+}
template <typename DataT>
void Dwarf5AccelTableWriter<DataT>::Header::emit(Dwarf5AccelTableWriter &Ctx) {
@@ -391,31 +397,39 @@ void Dwarf5AccelTableWriter<DataT>::Header::emit(Dwarf5AccelTableWriter &Ctx) {
Asm->OutStreamer->emitBytes({AugmentationString, AugmentationStringSize});
}
+static uint32_t constexpr LowerBitSize = dwarf::DW_IDX_type_hash;
+static uint32_t getTagFromAbbreviationTag(const uint32_t AbbrvTag) {
+ return AbbrvTag >> LowerBitSize;
+}
+static uint32_t
+constructAbbreviationTag(const unsigned Tag,
+ const GetIndexForEntryReturnType &EntryRet) {
+ uint32_t AbbrvTag = 0;
+ if (EntryRet)
+ AbbrvTag |= 1 << EntryRet->second.Index;
+ AbbrvTag |= 1 << dwarf::DW_IDX_die_offset;
+ AbbrvTag |= Tag << LowerBitSize;
+ return AbbrvTag;
+}
template <typename DataT>
-DenseSet<uint32_t> Dwarf5AccelTableWriter<DataT>::getUniqueTags() const {
- DenseSet<uint32_t> UniqueTags;
+void Dwarf5AccelTableWriter<DataT>::populateAbbrevsMap() {
for (auto &Bucket : Contents.getBuckets()) {
for (auto *Hash : Bucket) {
for (auto *Value : Hash->Values) {
+ GetIndexForEntryReturnType EntryRet =
+ getIndexForEntry(*static_cast<const DataT *>(Value));
unsigned Tag = static_cast<const DataT *>(Value)->getDieTag();
- UniqueTags.insert(Tag);
+ uint32_t AbbrvTag = constructAbbreviationTag(Tag, EntryRet);
+ if (Abbreviations.count(AbbrvTag) == 0) {
+ SmallVector<DWARF5AccelTableData::AttributeEncoding, 2> UA;
+ if (EntryRet)
+ UA.push_back(EntryRet->second);
+ UA.push_back({dwarf::DW_IDX_die_offset, dwarf::DW_FORM_ref4});
+ Abbreviations.try_emplace(AbbrvTag, UA);
+ }
}
}
}
- return UniqueTags;
-}
-
-template <typename DataT>
-SmallVector<typename Dwarf5AccelTableWriter<DataT>::AttributeEncoding, 2>
-Dwarf5AccelTableWriter<DataT>::getUniformAttributes() const {
- SmallVector<AttributeEncoding, 2> UA;
- if (CompUnits.size() > 1) {
- size_t LargestCUIndex = CompUnits.size() - 1;
- dwarf::Form Form = DIEInteger::BestForm(/*IsSigned*/ false, LargestCUIndex);
- UA.push_back({dwarf::DW_IDX_compile_unit, Form});
- }
- UA.push_back({dwarf::DW_IDX_die_offset, dwarf::DW_FORM_ref4});
- return UA;
}
template <typename DataT>
@@ -429,6 +443,17 @@ void Dwarf5AccelTableWriter<DataT>::emitCUList() const {
}
}
+template <typename DataT>
+void Dwarf5AccelTableWriter<DataT>::emitTUList() const {
+ for (const auto &TU : enumerate(TypeUnits)) {
+ Asm->OutStreamer->AddComment("Type unit " + Twine(TU.index()));
+ if (std::holds_alternative<MCSymbol *>(TU.value()))
+ Asm->emitDwarfSymbolReference(std::get<MCSymbol *>(TU.value()));
+ else
+ Asm->emitDwarfLengthOrOffset(std::get<uint64_t>(TU.value()));
+ }
+}
+
template <typename DataT>
void Dwarf5AccelTableWriter<DataT>::emitBuckets() const {
uint32_t Index = 1;
@@ -456,10 +481,11 @@ void Dwarf5AccelTableWriter<DataT>::emitAbbrevs() const {
Asm->OutStreamer->emitLabel(AbbrevStart);
for (const auto &Abbrev : Abbreviations) {
Asm->OutStreamer->AddComment("Abbrev code");
- assert(Abbrev.first != 0);
- Asm->emitULEB128(Abbrev.first);
- Asm->OutStreamer->AddComment(dwarf::TagString(Abbrev.first));
+ uint32_t Tag = getTagFromAbbreviationTag(Abbrev.first);
+ assert(Tag != 0);
Asm->emitULEB128(Abbrev.first);
+ Asm->OutStreamer->AddComment(dwarf::TagString(Tag));
+ Asm->emitULEB128(Tag);
for (const auto &AttrEnc : Abbrev.second) {
Asm->emitULEB128(AttrEnc.Index, dwarf::IndexString(AttrEnc.Index).data());
Asm->emitULEB128(AttrEnc.Form,
@@ -474,16 +500,21 @@ void Dwarf5AccelTableWriter<DataT>::emitAbbrevs() const {
template <typename DataT>
void Dwarf5AccelTableWriter<DataT>::emitEntry(const DataT &Entry) const {
- auto AbbrevIt = Abbreviations.find(Entry.getDieTag());
+ GetIndexForEntryReturnType EntryRet = getIndexForEntry(Entry);
+ uint32_t AbbrvTag = constructAbbreviationTag(Entry.getDieTag(), EntryRet);
+ auto AbbrevIt = Abbreviations.find(AbbrvTag);
assert(AbbrevIt != Abbreviations.end() &&
"Why wasn't this abbrev generated?");
-
+ assert(getTagFromAbbreviationTag(AbbrevIt->first) == Entry.getDieTag() &&
+ "Invalid Tag");
Asm->emitULEB128(AbbrevIt->first, "Abbreviation code");
+
for (const auto &AttrEnc : AbbrevIt->second) {
Asm->OutStreamer->AddComment(dwarf::IndexString(AttrEnc.Index));
switch (AttrEnc.Index) {
- case dwarf::DW_IDX_compile_unit: {
- DIEInteger ID(getCUIndexForEntry(Entry));
+ case dwarf::DW_IDX_compile_unit:
+ case dwarf::DW_IDX_type_unit: {
+ DIEInteger ID(EntryRet->first);
ID.emitValue(Asm, AttrEnc.Form);
break;
}
@@ -515,22 +546,21 @@ template <typename DataT>
Dwarf5AccelTableWriter<DataT>::Dwarf5AccelTableWriter(
AsmPrinter *Asm, const AccelTableBase &Contents,
ArrayRef<std::variant<MCSymbol *, uint64_t>> CompUnits,
- llvm::function_ref<unsigned(const DataT &)> getCUIndexForEntry)
+ ArrayRef<std::variant<MCSymbol *, uint64_t>> TypeUnits,
+ llvm::function_ref<GetIndexForEntryReturnType(const DataT &)>
+ getIndexForEntry)
: AccelTableWriter(Asm, Contents, false),
- Header(CompUnits.size(), Contents.getBucketCount(),
+ Header(CompUnits.size(), TypeUnits.size(), Contents.getBucketCount(),
Contents.getUniqueNameCount()),
- CompUnits(CompUnits), getCUIndexForEntry(std::move(getCUIndexForEntry)) {
- DenseSet<uint32_t> UniqueTags = getUniqueTags();
- SmallVector<AttributeEncoding, 2> UniformAttributes = getUniformAttributes();
-
- Abbreviations.reserve(UniqueTags.size());
- for (uint32_t Tag : UniqueTags)
- Abbreviations.try_emplace(Tag, UniformAttributes);
+ CompUnits(CompUnits), TypeUnits(TypeUnits),
+ getIndexForEntry(std::move(getIndexForEntry)) {
+ populateAbbrevsMap();
}
template <typename DataT> void Dwarf5AccelTableWriter<DataT>::emit() {
Header.emit(*this);
emitCUList();
+ emitTUList();
emitBuckets();
emitHashes();
emitStringOffsets();
@@ -548,12 +578,16 @@ void llvm::emitAppleAccelTableImpl(AsmPrinter *Asm, AccelTableBase &Contents,
AppleAccelTableWriter(Asm, Contents, Atoms, SecBegin).emit();
}
-void llvm::emitDWARF5AccelTable(
- AsmPrinter *Asm, DWARF5AccelTable &Contents, const DwarfDebug &DD,
- ArrayRef<std::unique_ptr<DwarfCompileUnit>> CUs) {
+void llvm::emitDWARF5AccelTable(AsmPrinter *Asm, DWARF5AccelTable &Contents,
+ const DwarfDebug &DD,
+ ArrayRef<std::unique_ptr<DwarfCompileUnit>> CUs,
+ TUVectorTy TUSymbols) {
std::vector<std::variant<MCSymbol *, uint64_t>> CompUnits;
+ std::vector<std::variant<MCSymbol *, uint64_t>> TypeUnits;
SmallVector<unsigned, 1> CUIndex(CUs.size());
- int Count = 0;
+ DenseMap<unsigned, unsigned> TUIndex(TUSymbols.size());
+ int CUCount = 0;
+ int TUCount = 0;
for (const auto &CU : enumerate(CUs)) {
switch (CU.value()->getCUNode()->getNameTableKind()) {
case DICompileUnit::DebugNameTableKind::Default:
@@ -562,13 +596,18 @@ void llvm::emitDWARF5AccelTable(
default:
continue;
}
- CUIndex[CU.index()] = Count++;
+ CUIndex[CU.index()] = CUCount++;
assert(CU.index() == CU.value()->getUniqueID());
const DwarfCompileUnit *MainCU =
DD.useSplitDwarf() ? CU.value()->getSkeleton() : CU.value().get();
CompUnits.push_back(MainCU->getLabelBegin());
}
+ for (const auto &TU : TUSymbols) {
+ TUIndex[TU.UniqueID] = TUCount++;
+ TypeUnits.push_back(TU.Label);
+ }
+
if (CompUnits.empty())
return;
@@ -576,10 +615,21 @@ void llvm::emitDWARF5AccelTable(
Asm->getObjFileLowering().getDwarfDebugNamesSection());
Contents.finalize(Asm, "names");
+ dwarf::Form CUIndexForm =
+ DIEInteger::BestForm(/*IsSigned*/ false, CompUnits.size() - 1);
+ dwarf::Form TUIndexForm =
+ DIEInteger::BestForm(/*IsSigned*/ false, TypeUnits.size() - 1);
Dwarf5AccelTableWriter<DWARF5AccelTableData>(
- Asm, Contents, CompUnits,
- [&](const DWARF5AccelTableData &Entry) {
- return CUIndex[Entry.getUnitID()];
+ Asm, Contents, CompUnits, TypeUnits,
+ [&](const DWARF5AccelTableData &Entry) -> GetIndexForEntryReturnType {
+ GetIndexForEntryReturnType Index = std::nullopt;
+ if (Entry.isTU())
+ Index = {TUIndex[Entry.getUnitID()],
+ {dwarf::DW_IDX_type_unit, TUIndexForm}};
+ else if (CUIndex.size() > 1)
+ Index = {CUIndex[Entry.getUnitID()],
+ {dwarf::DW_IDX_compile_unit, CUIndexForm}};
+ return Index;
})
.emit();
}
@@ -587,11 +637,12 @@ void llvm::emitDWARF5AccelTable(
void llvm::emitDWARF5AccelTable(
AsmPrinter *Asm, DWARF5AccelTable &Contents,
ArrayRef<std::variant<MCSymbol *, uint64_t>> CUs,
- llvm::function_ref<unsigned(const DWARF5AccelTableData &)>
- getCUIndexForEntry) {
+ llvm::function_ref<GetIndexForEntryReturnType(const DWARF5AccelTableData &)>
+ getIndexForEntry) {
+ std::vector<std::variant<MCSymbol *, uint64_t>> TypeUnits;
Contents.finalize(Asm, "names");
- Dwarf5AccelTableWriter<DWARF5AccelTableData>(Asm, Contents, CUs,
- getCUIndexForEntry)
+ Dwarf5AccelTableWriter<DWARF5AccelTableData>(Asm, Contents, CUs, TypeUnits,
+ getIndexForEntry)
.emit();
}
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
index 453dcc1c90bbf49..70dbd8e17c933ed 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
@@ -151,7 +151,7 @@ class DwarfCompileUnit final : public DwarfUnit {
UnitKind Kind = UnitKind::Full);
bool hasRangeLists() const { return HasRangeLists; }
- unsigned getUniqueID() const { return UniqueID; }
+ unsigned getUniqueID() const override { return UniqueID; }
DwarfCompileUnit *getSkeleton() const {
return Skeleton;
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 61ac492a9097063..3923ad61d825c8b 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -305,6 +305,7 @@ void Loc::MMI::addFrameIndexExpr(const DIExpression *Expr, int FI) {
static AccelTableKind computeAccelTableKind(unsigned DwarfVersion,
bool GenerateTypeUnits,
+ bool HasSplitDwarf,
DebuggerKind Tuning,
const Triple &TT) {
// Honor an explicit request.
@@ -312,7 +313,8 @@ static AccelTableKind computeAccelTableKind(unsigned DwarfVersion,
return AccelTables;
// Accelerator tables with type units are currently not supported.
- if (GenerateTypeUnits)
+ if (GenerateTypeUnits &&
+ (DwarfVersion < 5 || HasSplitDwarf || !TT.isOSBinFormatELF()))
return AccelTableKind::None;
// Accelerator tables get emitted if targetting DWARF v5 or LLDB. DWARF v5
@@ -325,6 +327,9 @@ static AccelTableKind computeAccelTableKind(unsigned DwarfVersion,
: AccelTableKind::Dwarf;
return AccelTableKind::None;
}
+void DwarfDebug::addTypeUnitSymbol(DwarfTypeUnit &U) {
+ InfoHolder.addTypeUnitSymbol(U);
+}
DwarfDebug::DwarfDebug(AsmPrinter *A)
: DebugHandlerBase(A), DebugLocs(A->OutStreamer->isVerboseAsm()),
@@ -400,8 +405,9 @@ DwarfDebug::DwarfDebug(AsmPrinter *A)
A->TM.getTargetTriple().isOSBinFormatWasm()) &&
GenerateDwarfTypeUnits;
- TheAccelTableKind = computeAccelTableKind(
- DwarfVersion, GenerateTypeUnits, DebuggerTuning, A->TM.getTargetTriple());
+ TheAccelTableKind =
+ computeAccelTableKind(DwarfVersion, GenerateTypeUnits, HasSplitDwarf,
+ DebuggerTuning, A->TM.getTargetTriple());
// Work around a GDB bug. GDB doesn't support the standard opcode;
// SCE doesn't support GNU's; LLDB prefers the standard opcode, which
@@ -2398,7 +2404,8 @@ void DwarfDebug::emitAccelDebugNames() {
if (getUnits().empty())
return;
- emitDWARF5AccelTable(Asm, AccelDebugNames, *this, getUnits());
+ emitDWARF5AccelTable(Asm, AccelDebugNames, *this, getUnits(),
+ getTypeUnitsSymbols());
}
// Emit visible names into a hashed accelerator table section.
@@ -3503,7 +3510,7 @@ void DwarfDebug::addDwarfTypeUnitType(DwarfCompileUnit &CU,
// Types referencing entries in the address table cannot be placed in type
// units.
if (AddrPool.hasBeenUsed()) {
-
+ AccelTypeUntsDebugNames.clear();
// Remove all the types built while building this type.
// This is pessimistic as some of these types might not be dependent on
// the type that used an address.
@@ -3518,11 +3525,16 @@ void DwarfDebug::addDwarfTypeUnitType(DwarfCompileUnit &CU,
return;
}
- // If the type wasn't dependent on fission addresses, finish adding the type
- // and all its dependent types.
for (auto &TU : TypeUnitsToAdd) {
InfoHolder.computeSizeAndOffsetsForUnit(TU.first.get());
InfoHolder.emitUnit(TU.first.get(), useSplitDwarf());
+ if (getDwarfVersion() >= 5 &&
+ getAccelTableKind() == AccelTableKind::Dwarf) {
+ addTypeUnitSymbol(*TU.first);
+ AccelTypeUntsDebugNames.convertDieToOffset();
+ AccelDebugNames.addTypeEntries(AccelTypeUntsDebugNames);
+ AccelTypeUntsDebugNames.clear();
+ }
}
}
CU.addDIETypeSignature(RefDie, Signature);
@@ -3552,8 +3564,15 @@ void DwarfDebug::addAccelNameImpl(const DICompileUnit &CU,
AppleAccel.addName(Ref, Die);
break;
case AccelTableKind::Dwarf: {
- DwarfCompileUnit *DCU = CUMap.lookup(&CU);
- AccelDebugNames.addName(Ref, Die, *DCU);
+ // The type unit can be discarded, so need to add references to final
+ // acceleration table once we know it's complete and we emit it.
+ if (TypeUnitsUnderConstruction.empty()) {
+ DwarfCompileUnit *Unit = CUMap.lookup(&CU);
+ AccelDebugNames.addName(Ref, Die, *Unit);
+ } else {
+ DwarfTypeUnit *Unit = TypeUnitsUnderConstruction.back().first.get();
+ AccelTypeUntsDebugNames.addName(Ref, Die, *Unit);
+ }
break;
}
case AccelTableKind::Default:
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
index b41d2be5eb9b8c9..66c87a68fa342ae 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -17,7 +17,6 @@
#include "DebugLocEntry.h"
#include "DebugLocStream.h"
#include "DwarfFile.h"
-#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/MapVector.h"
@@ -497,6 +496,7 @@ class DwarfDebug : public DebugHandlerBase {
/// Accelerator tables.
DWARF5AccelTable AccelDebugNames;
+ DWARF5AccelTable AccelTypeUntsDebugNames;
AccelTable<AppleAccelTableOffsetData> AccelNames;
AccelTable<AppleAccelTableOffsetData> AccelObjC;
AccelTable<AppleAccelTableOffsetData> AccelNamespace;
@@ -515,6 +515,13 @@ class DwarfDebug : public DebugHandlerBase {
return InfoHolder.getUnits();
}
+ /// Returns Type Units constructed for this module.
+ const TUVectorTy &getTypeUnitsSymbols() {
+ return InfoHolder.getTypeUnitsSymbols();
+ }
+
+ void addTypeUnitSymbol(DwarfTypeUnit &U);
+
using InlinedEntity = DbgValueHistoryMap::InlinedEntity;
void ensureAbstractEntityIsCreatedIfScoped(DwarfCompileUnit &CU,
@@ -780,6 +787,9 @@ class DwarfDebug : public DebugHandlerBase {
/// Returns what kind (if any) of accelerator tables to emit.
AccelTableKind getAccelTableKind() const { return TheAccelTableKind; }
+ /// Seet TheAccelTableKind
+ void setTheAccelTableKind(AccelTableKind K) { TheAccelTableKind = K; };
+
bool useAppleExtensionAttributes() const {
return HasAppleExtensionAttributes;
}
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfFile.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfFile.cpp
index eab798c0da78438..dd946426e8860f4 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfFile.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfFile.cpp
@@ -24,6 +24,10 @@ void DwarfFile::addUnit(std::unique_ptr<DwarfCompileUnit> U) {
CUs.push_back(std::move(U));
}
+void DwarfFile::addTypeUnitSymbol(DwarfTypeUnit &U) {
+ TUSymbols.emplace_back(U.getLabelBegin(), U.getUniqueID());
+}
+
// Emit the various dwarf units to the unit section USection with
// the abbreviations going into ASection.
void DwarfFile::emitUnits(bool UseOffsets) {
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfFile.h b/llvm/lib/CodeGen/AsmPrinter/DwarfFile.h
index f76858fc2f36a02..6b48984b818c3d0 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfFile.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfFile.h
@@ -28,6 +28,7 @@ class DbgLabel;
class DINode;
class DILocalScope;
class DwarfCompileUnit;
+class DwarfTypeUnit;
class DwarfUnit;
class LexicalScope;
class MCSection;
@@ -47,6 +48,14 @@ struct RangeSpanList {
SmallVector<RangeSpan, 2> Ranges;
};
+struct TypeUnitMetaInfo {
+ TypeUnitMetaInfo(MCSymbol *L, unsigned ID) : Label(L), UniqueID(ID) {}
+ // Symbol for start of the TU section.
+ MCSymbol *Label;
+ unsigned UniqueID;
+};
+using TUVectorTy = SmallVector<TypeUnitMetaInfo, 1>;
+
class DwarfFile {
// Target of Dwarf emission, used for sizing of abbreviations.
AsmPrinter *Asm;
@@ -59,6 +68,9 @@ class DwarfFile {
// A pointer to all units in the section.
SmallVector<std::unique_ptr<DwarfCompileUnit>, 1> CUs;
+ // Symbols to start of all the TU sections that were generated.
+ TUVectorTy TUSymbols;
+
DwarfStringPool StrPool;
// List of range lists for a given compile unit, separate from the ranges for
@@ -103,6 +115,9 @@ class DwarfFile {
return CUs;
}
+ /// Returns type units that were constructed.
+ const TUVectorTy &getTypeUnitsSymbols() { return TUSymbols; }
+
std::pair<uint32_t, RangeSpanList *> addRange(const DwarfCompileUnit &CU,
SmallVector<RangeSpan, 2> R);
@@ -124,6 +139,11 @@ class DwarfFile {
/// Add a unit to the list of CUs.
void addUnit(std::unique_ptr<DwarfCompileUnit> U);
+ /// Add a unit to the list of TUs.
+ /// Preserves type unit so that memory is not released before DWARF5
+ /// accelerator table is created.
+ void addTypeUnitSymbol(DwarfTypeUnit &U);
+
/// Emit all of the units to the section listed with the given
/// abbreviation section.
void emitUnits(bool UseOffsets);
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
index a5960a5d4a09a17..d095594655a05ea 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
@@ -83,11 +83,13 @@ DwarfUnit::DwarfUnit(dwarf::Tag UnitTag, const DICompileUnit *Node,
AsmPrinter *A, DwarfDebug *DW, DwarfFile *DWU)
: DIEUnit(UnitTag), CUNode(Node), Asm(A), DD(DW), DU(DWU) {}
+unsigned DwarfTypeUnit::UniqueID = 0;
DwarfTypeUnit::DwarfTypeUnit(DwarfCompileUnit &CU, AsmPrinter *A,
DwarfDebug *DW, DwarfFile *DWU,
MCDwarfDwoLineTable *SplitLineTable)
: DwarfUnit(dwarf::DW_TAG_type_unit, CU.getCUNode(), A, DW, DWU), CU(CU),
SplitLineTable(SplitLineTable) {
+ ++DwarfTypeUnit::UniqueID;
}
DwarfUnit::~DwarfUnit() {
@@ -1777,6 +1779,10 @@ void DwarfUnit::emitCommonHeader(bool UseOffsets, dwarf::UnitType UT) {
}
void DwarfTypeUnit::emitHeader(bool UseOffsets) {
+ if (!DD->useSplitDwarf()) {
+ LabelBegin = Asm->createTempSymbol("tu_begin");
+ Asm->OutStreamer->emitLabel(LabelBegin);
+ }
DwarfUnit::emitCommonHeader(UseOffsets,
DD->useSplitDwarf() ? dwarf::DW_UT_split_type
: dwarf::DW_UT_type);
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
index 8f17e94c2d1c331..29c560a1cee0ff1 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
@@ -301,6 +301,9 @@ class DwarfUnit : public DIEUnit {
/// Get context owner's DIE.
DIE *createTypeDIE(const DICompositeType *Ty);
+ /// Returns a unique ID.
+ virtual unsigned getUniqueID() const = 0;
+
protected:
~DwarfUnit();
@@ -358,10 +361,13 @@ class DwarfUnit : public DIEUnit {
class DwarfTypeUnit final : public DwarfUnit {
uint64_t TypeSignature;
+ static unsigned UniqueID;
const DIE *Ty;
DwarfCompileUnit &CU;
MCDwarfDwoLineTable *SplitLineTable;
bool UsedLineTable = false;
+ /// The start of the type unit within .debug_nfo section.
+ MCSymbol *LabelBegin = nullptr;
unsigned getOrCreateSourceID(const DIFile *File) override;
void finishNonUnitTypeDIE(DIE& D, const DICompositeType *CTy) override;
@@ -372,6 +378,8 @@ class DwarfTypeUnit final : public DwarfUnit {
DwarfFile *DWU, MCDwarfDwoLineTable *SplitLineTable = nullptr);
void setTypeSignature(uint64_t Signature) { TypeSignature = Signature; }
+ /// Returns Type Signature.
+ uint64_t getTypeSignature() const { return TypeSignature; }
void setType(const DIE *Ty) { this->Ty = Ty; }
/// Emit the header for this unit, not including the initial length field.
@@ -385,6 +393,13 @@ class DwarfTypeUnit final : public DwarfUnit {
void addGlobalType(const DIType *Ty, const DIE &Die,
const DIScope *Context) override;
DwarfCompileUnit &getCU() override { return CU; }
+ /// Get the the symbol for start of the section for this type unit.
+ MCSymbol *getLabelBegin() const {
+ assert(LabelBegin && "LabelBegin is not initialized");
+ return LabelBegin;
+ }
+
+ unsigned getUniqueID() const override { return UniqueID; }
};
} // end llvm namespace
#endif
diff --git a/llvm/lib/DWARFLinker/DWARFStreamer.cpp b/llvm/lib/DWARFLinker/DWARFStreamer.cpp
index 2c6aba7225adcce..53a75f429880118 100644
--- a/llvm/lib/DWARFLinker/DWARFStreamer.cpp
+++ b/llvm/lib/DWARFLinker/DWARFStreamer.cpp
@@ -306,10 +306,20 @@ void DwarfStreamer::emitDebugNames(DWARF5AccelTable &Table) {
}
Asm->OutStreamer->switchSection(MOFI->getDwarfDebugNamesSection());
- emitDWARF5AccelTable(Asm.get(), Table, CompUnits,
- [&UniqueIdToCuMap](const DWARF5AccelTableData &Entry) {
- return UniqueIdToCuMap[Entry.getUnitID()];
- });
+ dwarf::Form Form = DIEInteger::BestForm(/*IsSigned*/ false,
+ (uint64_t)UniqueIdToCuMap.size() - 1);
+ /// llvm-dwarfutil doesn't support type units + .debug_names right now anyway,
+ /// so just keeping current behavior.
+ emitDWARF5AccelTable(
+ Asm.get(), Table, CompUnits,
+ [&UniqueIdToCuMap,
+ &Form](const DWARF5AccelTableData &Entry) -> GetIndexForEntryReturnType {
+ GetIndexForEntryReturnType Index = std::nullopt;
+ if (UniqueIdToCuMap.size() > 1)
+ Index = {UniqueIdToCuMap[Entry.getUnitID()],
+ {dwarf::DW_IDX_compile_unit, Form}};
+ return Index;
+ });
}
void DwarfStreamer::emitAppleNamespaces(
diff --git a/llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.cpp b/llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.cpp
index 88038824c9dcb4d..00b2437efdf9073 100644
--- a/llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.cpp
+++ b/llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.cpp
@@ -230,9 +230,18 @@ void DwarfEmitterImpl::emitDebugNames(DWARF5AccelTable &Table,
return;
Asm->OutStreamer->switchSection(MOFI->getDwarfDebugNamesSection());
+ dwarf::Form Form =
+ DIEInteger::BestForm(/*IsSigned*/ false, (uint64_t)CUidToIdx.size() - 1);
+ /// DWARFLinker doesn't support type units + .debug_names right now anyway,
+ /// so just keeping current behavior.
emitDWARF5AccelTable(Asm.get(), Table, CUOffsets,
- [&CUidToIdx](const DWARF5AccelTableData &Entry) {
- return CUidToIdx[Entry.getUnitID()];
+ [&CUidToIdx, &Form](const DWARF5AccelTableData &Entry)
+ -> GetIndexForEntryReturnType {
+ GetIndexForEntryReturnType Index = std::nullopt;
+ if (CUidToIdx.size() > 1)
+ Index = {CUidToIdx[Entry.getUnitID()],
+ {dwarf::DW_IDX_compile_unit, Form}};
+ return Index;
});
}
diff --git a/llvm/test/DebugInfo/X86/accel-tables-dwarf5.ll b/llvm/test/DebugInfo/X86/accel-tables-dwarf5.ll
index e7cf7968003d9a6..243dea608a2d7f7 100644
--- a/llvm/test/DebugInfo/X86/accel-tables-dwarf5.ll
+++ b/llvm/test/DebugInfo/X86/accel-tables-dwarf5.ll
@@ -22,7 +22,6 @@
; RUN: | llvm-readobj --sections - | FileCheck --check-prefix=DEBUG_NAMES %s
; NONE-NOT: apple_names
-; NONE-NOT: debug_names
; DEBUG_NAMES-NOT: apple_names
; DEBUG_NAMES: debug_names
diff --git a/llvm/test/DebugInfo/X86/debug-names-dwarf64.ll b/llvm/test/DebugInfo/X86/debug-names-dwarf64.ll
index 8cd1f0c18292093..c6edd794607c201 100644
--- a/llvm/test/DebugInfo/X86/debug-names-dwarf64.ll
+++ b/llvm/test/DebugInfo/X86/debug-names-dwarf64.ll
@@ -26,14 +26,14 @@
; CHECK-NEXT: CU[0]: 0x00000000
; CHECK-NEXT: ]
; CHECK-NEXT: Abbreviations [
-; CHECK-NEXT: Abbreviation [[ABBREV1:0x[0-9a-f]*]] {
-; CHECK-NEXT: Tag: DW_TAG_variable
-; CHECK-NEXT: DW_IDX_die_offset: DW_FORM_ref4
-; CHECK-NEXT: }
; CHECK-NEXT: Abbreviation [[ABBREV:0x[0-9a-f]*]] {
; CHECK-NEXT: Tag: DW_TAG_base_type
; CHECK-NEXT: DW_IDX_die_offset: DW_FORM_ref4
; CHECK-NEXT: }
+; CHECK-NEXT: Abbreviation [[ABBREV1:0x[0-9a-f]*]] {
+; CHECK-NEXT: Tag: DW_TAG_variable
+; CHECK-NEXT: DW_IDX_die_offset: DW_FORM_ref4
+; CHECK-NEXT: }
; CHECK-NEXT: ]
; CHECK-NEXT: Bucket 0 [
; CHECK-NEXT: Name 1 {
diff --git a/llvm/test/DebugInfo/X86/debug-names-types-monolithic.ll b/llvm/test/DebugInfo/X86/debug-names-types-monolithic.ll
new file mode 100644
index 000000000000000..84f8ff0d4d9050a
--- /dev/null
+++ b/llvm/test/DebugInfo/X86/debug-names-types-monolithic.ll
@@ -0,0 +1,163 @@
+; This checks that .debug_names can be generated with monolithic -fdebug-type-sections.
+
+; RUN: llc -mtriple=x86_64 -generate-type-units -dwarf-version=5 -filetype=obj %s -o %t
+; RUN: llvm-dwarfdump -debug-info -debug-names %t | FileCheck %s
+
+; CHECK: .debug_info contents:
+; CHECK: DW_TAG_type_unit
+; CHECK-NEXT: DW_AT_language (DW_LANG_C_plus_plus_14)
+; CHECK-NEXT: DW_AT_stmt_list (0x00000000)
+; CHECK-NEXT: DW_AT_str_offsets_base (0x00000008)
+; CHECK: DW_TAG_structure_type
+; CHECK-NEXT: DW_AT_calling_convention (DW_CC_pass_by_value)
+; CHECK-NEXT: DW_AT_name ("Foo")
+; CHECK-NEXT: DW_AT_byte_size (0x08)
+; CHECK-NEXT: DW_AT_decl_file ("/typeSmall/main.cpp")
+; CHECK-NEXT: DW_AT_decl_line (1)
+; CHECK: DW_TAG_member
+; CHECK-NEXT: DW_AT_name ("c1")
+; CHECK-NEXT: DW_AT_type (0x00000033 "char *")
+; CHECK-NEXT: DW_AT_decl_file ("/typeSmall/main.cpp")
+; CHECK-NEXT: DW_AT_decl_line (2)
+; CHECK-NEXT: DW_AT_data_member_location (0x00)
+; CHECK: DW_TAG_pointer_type
+; CHECK-NEXT: DW_AT_type (0x00000038 "char")
+; CHECK: DW_TAG_base_type
+; CHECK-NEXT: DW_AT_name ("char")
+; CHECK-NEXT: DW_AT_encoding (DW_ATE_signed_char)
+; CHECK-NEXT: DW_AT_byte_size (0x01)
+; CHECK: .debug_names contents:
+; CHECK: Compilation Unit offsets [
+; CHECK-NEXT: CU[0]: 0x00000000
+; CHECK-NEXT: ]
+; CHECK-NEXT: Local Type Unit offsets [
+; CHECK-NEXT: LocalTU[0]: 0x00000000
+; CHECK-NEXT: ]
+; CHECK: Abbreviations [
+; CHECK-NEXT: Abbreviation [[ABBREV1:0x[0-9a-f]*]] {
+; CHECK-NEXT: Tag: DW_TAG_structure_type
+; CHECK-NEXT: DW_IDX_die_offset: DW_FORM_ref4
+; CHECK-NEXT: }
+; CHECK-NEXT: Abbreviation [[ABBREV3:0x[0-9a-f]*]] {
+; CHECK-NEXT: Tag: DW_TAG_structure_type
+; CHECK-NEXT: DW_IDX_type_unit: DW_FORM_data1
+; CHECK-NEXT: DW_IDX_die_offset: DW_FORM_ref4
+; CHECK-NEXT: }
+; CHECK-NEXT: Abbreviation [[ABBREV:0x[0-9a-f]*]] {
+; CHECK-NEXT: Tag: DW_TAG_base_type
+; CHECK-NEXT: DW_IDX_die_offset: DW_FORM_ref4
+; CHECK-NEXT: }
+; CHECK-NEXT: Abbreviation [[ABBREV2:0x[0-9a-f]*]] {
+; CHECK-NEXT: Tag: DW_TAG_subprogram
+; CHECK-NEXT: DW_IDX_die_offset: DW_FORM_ref4
+; CHECK-NEXT: }
+; CHECK-NEXT: Abbreviation [[ABBREV4:0x[0-9a-f]*]] {
+; CHECK-NEXT: Tag: DW_TAG_base_type
+; CHECK-NEXT: DW_IDX_type_unit: DW_FORM_data1
+; CHECK-NEXT: DW_IDX_die_offset: DW_FORM_ref4
+; CHECK-NEXT: }
+; CHECK-NEXT: ]
+; CHECK-NEXT: Bucket 0 [
+; CHECK-NEXT: Name 1 {
+; CHECK-NEXT: Hash: 0xB888030
+; CHECK-NEXT: String: {{.+}} "int"
+; CHECK-NEXT: Entry @ {{.+}} {
+; CHECK-NEXT: Abbrev: [[ABBREV]]
+; CHECK-NEXT: Tag: DW_TAG_base_type
+; CHECK-NEXT: DW_IDX_die_offset: 0x0000003e
+; CHECK-NEXT: }
+; CHECK-NEXT: }
+; CHECK-NEXT: ]
+; CHECK-NEXT: Bucket 1 [
+; CHECK-NEXT: Name 2 {
+; CHECK-NEXT: Hash: 0xB887389
+; CHECK-NEXT: String: {{.+}} "Foo"
+; CHECK-NEXT: Entry @ {{.+}} {
+; CHECK-NEXT: Abbrev: [[ABBREV3]]
+; CHECK-NEXT: Tag: DW_TAG_structure_type
+; CHECK-NEXT: DW_IDX_type_unit: 0x00
+; CHECK-NEXT: DW_IDX_die_offset: 0x00000023
+; CHECK-NEXT: }
+; CHECK-NEXT: Entry @ 0xaa {
+; CHECK-NEXT: Abbrev: [[ABBREV1]]
+; CHECK-NEXT: Tag: DW_TAG_structure_type
+; CHECK-NEXT: DW_IDX_die_offset: 0x00000042
+; CHECK-NEXT: }
+; CHECK-NEXT: }
+; CHECK-NEXT: ]
+; CHECK-NEXT: Bucket 2 [
+; CHECK-NEXT: Name 3 {
+; CHECK-NEXT: Hash: 0x7C9A7F6A
+; CHECK-NEXT: String: {{.+}} "main"
+; CHECK-NEXT: Entry @ {{.+}} {
+; CHECK-NEXT: Abbrev: [[ABBREV2]]
+; CHECK-NEXT: Tag: DW_TAG_subprogram
+; CHECK-NEXT: DW_IDX_die_offset: 0x00000023
+; CHECK-NEXT: }
+; CHECK-NEXT: }
+; CHECK-NEXT: ]
+; CHECK-NEXT: Bucket 3 [
+; CHECK-NEXT: Name 4 {
+; CHECK-NEXT: Hash: 0x7C952063
+; CHECK-NEXT: String: {{.+}} "char"
+; CHECK-NEXT: Entry @ {{.+}} {
+; CHECK-NEXT: Abbrev: [[ABBREV4]]
+; CHECK-NEXT: Tag: DW_TAG_base_type
+; CHECK-NEXT: DW_IDX_type_unit: 0x00
+; CHECK-NEXT: DW_IDX_die_offset: 0x00000038
+; CHECK-NEXT: }
+; CHECK-NEXT: }
+; CHECK-NEXT: ]
+; CHECK-NEXT: }
+
+
+; ModuleID = 'main.cpp'
+source_filename = "main.cpp"
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%struct.Foo = type { ptr }
+
+; Function Attrs: mustprogress noinline norecurse nounwind optnone uwtable
+define dso_local noundef i32 @main() #0 !dbg !10 {
+entry:
+ %retval = alloca i32, align 4
+ %f = alloca %struct.Foo, align 8
+ store i32 0, ptr %retval, align 4
+ call void @llvm.dbg.declare(metadata ptr %f, metadata !15, metadata !DIExpression()), !dbg !21
+ ret i32 0, !dbg !22
+}
+
+; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+attributes #0 = { mustprogress noinline norecurse nounwind optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!2, !3, !4, !5, !6, !7, !8}
+!llvm.ident = !{!9}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 18.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false)
+!1 = !DIFile(filename: "main.cpp", directory: "/typeSmall", checksumkind: CSK_MD5, checksum: "e5b402e9dbafe24c7adbb087d1f03549")
+!2 = !{i32 7, !"Dwarf Version", i32 5}
+!3 = !{i32 2, !"Debug Info Version", i32 3}
+!4 = !{i32 1, !"wchar_size", i32 4}
+!5 = !{i32 8, !"PIC Level", i32 2}
+!6 = !{i32 7, !"PIE Level", i32 2}
+!7 = !{i32 7, !"uwtable", i32 2}
+!8 = !{i32 7, !"frame-pointer", i32 2}
+!9 = !{!"clang version 18.0.0"}
+!10 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !11, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !14)
+!11 = !DISubroutineType(types: !12)
+!12 = !{!13}
+!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!14 = !{}
+!15 = !DILocalVariable(name: "f", scope: !10, file: !1, line: 5, type: !16)
+!16 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "Foo", file: !1, line: 1, size: 64, flags: DIFlagTypePassByValue, elements: !17, identifier: "_ZTS3Foo")
+!17 = !{!18}
+!18 = !DIDerivedType(tag: DW_TAG_member, name: "c1", scope: !16, file: !1, line: 2, baseType: !19, size: 64)
+!19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !20, size: 64)
+!20 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!21 = !DILocation(line: 5, column: 6, scope: !10)
+!22 = !DILocation(line: 6, column: 2, scope: !10)
diff --git a/llvm/test/DebugInfo/X86/debug-names-types-split.ll b/llvm/test/DebugInfo/X86/debug-names-types-split.ll
new file mode 100644
index 000000000000000..d5908aeaf114a20
--- /dev/null
+++ b/llvm/test/DebugInfo/X86/debug-names-types-split.ll
@@ -0,0 +1,57 @@
+; This checks that .debug_names is not generated with split-dwarf + -fdebug-type-sections.
+
+; RUN: llc -mtriple=x86_64 -generate-type-units -dwarf-version=5 -filetype=obj -split-dwarf-file=mainTypes.dwo --split-dwarf-output=mainTypes.dwo %s -o %t
+; RUN: llvm-readelf --sections %t | FileCheck %s
+
+; CHECK-NOT: .debug_names
+
+; ModuleID = 'main.cpp'
+source_filename = "main.cpp"
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%struct.Foo = type { ptr }
+
+; Function Attrs: mustprogress noinline norecurse nounwind optnone uwtable
+define dso_local noundef i32 @main() #0 !dbg !10 {
+entry:
+ %retval = alloca i32, align 4
+ %f = alloca %struct.Foo, align 8
+ store i32 0, ptr %retval, align 4
+ call void @llvm.dbg.declare(metadata ptr %f, metadata !15, metadata !DIExpression()), !dbg !21
+ ret i32 0, !dbg !22
+}
+
+; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+attributes #0 = { mustprogress noinline norecurse nounwind optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!2, !3, !4, !5, !6, !7, !8}
+!llvm.ident = !{!9}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 18.0.0 (ssh://git.vip.facebook.com/data/gitrepos/osmeta/external/llvm-project 680deb27e25976d9b74ad7b48ec5cb96be0e44b6)", isOptimized: false, runtimeVersion: 0, splitDebugFilename: "main.dwo", emissionKind: FullDebug, splitDebugInlining: false)
+!1 = !DIFile(filename: "main.cpp", directory: "/home/ayermolo/local/tasks/T138552329/typeSmallSplit", checksumkind: CSK_MD5, checksum: "e5b402e9dbafe24c7adbb087d1f03549")
+!2 = !{i32 7, !"Dwarf Version", i32 5}
+!3 = !{i32 2, !"Debug Info Version", i32 3}
+!4 = !{i32 1, !"wchar_size", i32 4}
+!5 = !{i32 8, !"PIC Level", i32 2}
+!6 = !{i32 7, !"PIE Level", i32 2}
+!7 = !{i32 7, !"uwtable", i32 2}
+!8 = !{i32 7, !"frame-pointer", i32 2}
+!9 = !{!"clang version 18.0.0 (ssh://git.vip.facebook.com/data/gitrepos/osmeta/external/llvm-project 680deb27e25976d9b74ad7b48ec5cb96be0e44b6)"}
+!10 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !11, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !14)
+!11 = !DISubroutineType(types: !12)
+!12 = !{!13}
+!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!14 = !{}
+!15 = !DILocalVariable(name: "f", scope: !10, file: !1, line: 5, type: !16)
+!16 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "Foo", file: !1, line: 1, size: 64, flags: DIFlagTypePassByValue, elements: !17, identifier: "_ZTS3Foo")
+!17 = !{!18}
+!18 = !DIDerivedType(tag: DW_TAG_member, name: "c1", scope: !16, file: !1, line: 2, baseType: !19, size: 64)
+!19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !20, size: 64)
+!20 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!21 = !DILocation(line: 5, column: 6, scope: !10)
+!22 = !DILocation(line: 6, column: 2, scope: !10)
diff --git a/llvm/test/tools/dsymutil/ARM/dwarf5-dwarf4-combination-macho.test b/llvm/test/tools/dsymutil/ARM/dwarf5-dwarf4-combination-macho.test
index 90f6818b8c8e5b0..3e4d90490931666 100644
--- a/llvm/test/tools/dsymutil/ARM/dwarf5-dwarf4-combination-macho.test
+++ b/llvm/test/tools/dsymutil/ARM/dwarf5-dwarf4-combination-macho.test
@@ -44,7 +44,7 @@ CHECK:.debug_abbrev contents:
CHECK-NEXT: Abbrev table for offset: 0x00000000
CHECK: .debug_info contents:
-CHECK: 0x00000000: Compile Unit: length = 0x0000004a, format = DWARF32, version = 0x0005, unit_type = DW_UT_compile, abbr_offset = 0x0000, addr_size = 0x08
+CHECK: 0x00000000: Compile Unit: length = 0x0000004a, format = DWARF32, version = 0x0005, unit_type = DW_UT_compile, abbr_offset = 0x0000, addr_size = 0x08
CHECK: DW_AT_producer [DW_FORM_strx] (indexed (00000000) string = "Apple clang version 14.0.3 (clang-1403.0.22.14.1)")
CHECK: DW_AT_name [DW_FORM_strx] (indexed (00000001) string = "a.cpp")
CHECK: DW_AT_LLVM_sysroot [DW_FORM_strx] (indexed (00000002) string = "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk")
@@ -59,12 +59,12 @@ CHECK-NEXT: DW_AT_low_pc [DW_FORM_addrx] (indexed (00000000) address = 0x[[
CHECK: DW_AT_linkage_name [DW_FORM_strx] (indexed (00000005) string = "_Z4foo2i")
CHECK: DW_AT_name [DW_FORM_strx] (indexed (00000006) string = "foo2")
CHECK: 0x0000003c: DW_TAG_formal_parameter [3] (0x0000002c)
-CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x[[LOCLIST_OFFSET:[0-9a-f]+]]:
+CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x[[LOCLIST_OFFSET:[0-9a-f]+]]:
CHECK-NEXT: [0x[[#%.16x,LOCLIST_PAIR_START:]], 0x[[#%.16x,LOCLIST_PAIR_END:]]): [[LOCLIST_EXPR:.*]]
CHECK-NEXT: [0x[[#%.16x,LOCLIST_PAIR_START2:]], 0x[[#%.16x,LOCLIST_PAIR_END2:]]): [[LOCLIST_EXPR2:.*]])
CHECK: DW_AT_name [DW_FORM_strx] (indexed (00000007) string = "a")
-CHECK: 0x0000004e: Compile Unit: length = 0x00000072, format = DWARF32, version = 0x0004, abbr_offset = 0x00{{00|5a}}, addr_size = 0x08
+CHECK: 0x0000004e: Compile Unit: length = 0x00000072, format = DWARF32, version = 0x0004, abbr_offset = 0x00{{00|5a}}, addr_size = 0x08
CHECK: DW_AT_producer [DW_FORM_strp] ( .debug_str[0x00000001] = "Apple clang version 14.0.3 (clang-1403.0.22.14.1)")
CHECK: DW_AT_name [DW_FORM_strp] ( .debug_str[0x000000e0] = "b.cpp")
CHECK: DW_AT_LLVM_sysroot [DW_FORM_strp] ( .debug_str[0x00000039] = "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk")
@@ -79,7 +79,7 @@ CHECK-NEXT: DW_AT_low_pc [DW_FORM_addr] (0x[[#%.16x,LOC_LOWPC
CHECK: DW_AT_linkage_name [DW_FORM_strp] ( .debug_str[0x000000e6] = "_Z3bari")
CHECK: DW_AT_name [DW_FORM_strp] ( .debug_str[0x000000ee] = "bar")
CHECK: 0x0000009d: DW_TAG_formal_parameter {{.*}} (0x00000080)
-CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x[[LOC_OFFSET:[0-9a-f]+]]:
+CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x[[LOC_OFFSET:[0-9a-f]+]]:
CHECK-NEXT: [0x[[#%.16x,LOC_PAIR_START:]], 0x[[#%.16x,LOC_PAIR_END:]]): [[LOC_EXPR:.*]]
CHECK-NEXT: [0x[[#%.16x,LOC_PAIR_START2:]], 0x[[#%.16x,LOC_PAIR_END2:]]): [[LOC_EXPR2:.*]])
CHECK: DW_AT_name [DW_FORM_strp] ( .debug_str[0x000000f2] = "x")
@@ -91,7 +91,7 @@ CHECK-NEXT: (0x[[#sub(LOC_PAIR_START2,LOC_LOWPC)]], 0x[[#sub(LOC_PAIR
CHECK: .debug_loclists contents:
CHECK-NEXT: 0x00000000: locations list header: length = 0x00000018, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
-CHECK-NEXT: 0x[[LOCLIST_OFFSET]]:
+CHECK-NEXT: 0x[[LOCLIST_OFFSET]]:
CHECK-NEXT: DW_LLE_base_addressx (0x0000000000000000)
CHECK-NEXT: DW_LLE_offset_pair (0x[[#sub(LOCLIST_PAIR_START,LOCLIST_LOWPC)]], 0x[[#sub(LOCLIST_PAIR_END,LOCLIST_LOWPC)]])
CHECK-NEXT: DW_LLE_offset_pair (0x[[#sub(LOCLIST_PAIR_START2,LOCLIST_LOWPC)]], 0x[[#sub(LOCLIST_PAIR_END2,LOCLIST_LOWPC)]])
@@ -205,7 +205,7 @@ CHECK-NEXT: 0x00000028: 000000dc "int"
CHECK: .debug_names contents:
CHECK-NEXT: Name Index @ 0x0 {
CHECK-NEXT: Header {
-CHECK-NEXT: Length: 0xBC
+CHECK-NEXT: Length: 0xC4
CHECK-NEXT: Format: DWARF32
CHECK-NEXT: Version: 5
CHECK-NEXT: CU count: 2
@@ -213,6 +213,6 @@ CHECK-NEXT: Local TU count: 0
CHECK-NEXT: Foreign TU count: 0
CHECK-NEXT: Bucket count: 5
CHECK-NEXT: Name count: 5
-CHECK-NEXT: Abbreviations table size: 0x11
+CHECK-NEXT: Abbreviations table size: 0x13
CHECK-NEXT: Augmentation: 'LLVM0700'
CHECK-NEXT: }
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